Sorry for my imprecise response. The article you linked is talking about the "Vegan versus meat-based cat food..." study specifically. I was refering back to the study I referenced in a previous comment, "The Impact of Vegan Diets on Indicators of Health in Dogs and Cats: A Systematic Review.". The systematic review is essentially a big picture analysis of 16 other studies, 6 specifically about cats. The "Vegan versus meat-based cat food..." study was not included.

The systematic review says there is not enough evidence at this point to say whether a vegan diet is better or worse. I still stand behind "there is isn’t clear scientific evidence to conclude it is inately worse".

I'm not putting any pets on a vegan diet. First, I don't personally follow any vegan practices even for myself. Secondly, it's risky at this point, and I don't have enough resources (time, money, attention to detail) to minimize those risks. I keep pets because animal shelters kill animals that they do not have the capacity to support. I can imagine others, even those who practice vegan lifestyles, would commonly cite a similar motive.